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| Titel |
Intermediate flow regimes in single-/dual- continuum modeling of soil water flow and solute transport |
| VerfasserIn |
M. Dohnal, J. Brezina, T. Vogel, J. Dusek |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250028011
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| Zusammenfassung |
| The aim of our study is to seek more versatile and robust solution of flow and transport
problems involving preferential flow. Dual-continuum models of soil water movement are
useful whenever significant local pressure disequilibrium, between slow moving water
contained in the soil matrix and fast moving water in the preferential pathways, is
encountered.
The set of two governing Richard’s equations, representing the flow in a dual-continuum
system, can be solved using sequentially coupled approach or fully coupled approach. To
illustrate the performance of the fully coupled approach, as implemented in the new version
of our S1D code, we present a simple example problem involving one-dimensional variably
saturated flow in a vertical soil column, conceptualized as a dual-continuum system. The new
version of S1D code, unlike the previous versions, allows for studying the complete class of
intermediate flow regimes ranging from strongly preferential flow regime (in a
dual-continuum system) to pure soil matrix flow regime (in a single-continuum system). |
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